121201011011 has 4 divisors (see below), whose sum is σ = 121217807400. Its totient is φ = 121184214624.

The previous prime is 121201010999. The next prime is 121201011017. The reversal of 121201011011 is 110110102121.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121201011011 - 2⁶ = 121201010947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121201010983 and 121201011001.

It is not an unprimeable number, because it can be changed into a prime (121201011017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8387366 + ... + 8401803.

It is an arithmetic number, because the mean of its divisors is an integer number (30304451850).

Almost surely, 2^121201011011 is an apocalyptic number.

121201011011 is a deficient number, since it is larger than the sum of its proper divisors (16796389).

121201011011 is an equidigital number, since it uses as much as digits as its factorization.

121201011011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16796388.

The product of its (nonzero) digits is 4, while the sum is 11.

Adding to 121201011011 its reverse (110110102121), we get a palindrome (231311113132).

The spelling of 121201011011 in words is "one hundred twenty-one billion, two hundred one million, eleven thousand, eleven".